Question about 1995 GMC Jimmy

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1995 gmc jimmy 4x4 rough idle smell gas from tail pipe

1995 jimmy with a rough idle and smell gas from tail pipe. When driving runs rough also like gas not mixing correctly. I think might be egr valve but wondering what sensors mix gas and oil or if might be something else. Also when give it gas does not ecelerate correctly has to have more rpms to ecelerate like normal. Any help useful thanks

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  • sambates0924 Jul 25, 2009

    changed plugs, oil, gas, and air filters with no change.

  • dirtman-87 Sep 15, 2009

    driving down the road and the rad cap blew off know it runs ruff and has no power it is hard to start

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To check EGR valve, plug the vacuum hose to it, and it should not get hot anymore. It if does, it is leaking.
But gas smell is usually bad plug wire or plug.
With good insulation, remove one sparkplug wire at a time, to see if one has no effect. That is the target.

Posted on Jul 25, 2009

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  • GMC Master
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It sounds like one of your injectors is hanging up. Are you using alot more fuel than usual? While the engine is running take the electricle connector from each injector one at a time and replace them one at a time if one of the injectors is faulty you wont hear any change in the engine speed. Otherwise when you disconnect the wire from each one that cylinder will start to skip. If none of them make a difference your problem could be a multitude of things in example, crank position sensor, map sensor,throttle position sensor, air flow sensor,engine temp sensor etc. All of which would be quicly identified for about 75 bucks at a dealer and I MEAN DEALER, not Joes Sunoco down the street.

Posted on Jul 25, 2009

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Posted on Jan 02, 2017

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